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November 4, 2026

Technical System Designer

Mid • On-site

Warsaw, Poland

Quick Facts

  • Role: Technical System Designer

Description

Translate requirements and acceptance criteria into technical designs that define system behavior, data flows, inter-system contracts, component responsibilities, and error handling. Analyze existing code and application behavior to validate solutions, collaborate with analysts/architects/developers during implementation, and troubleshoot performance issues with optimization recommendations. Use AI tools to analyze, design, and document changes while critically verifying outputs, and strengthen security through secure-by-design solutions.

Responsibilities

  • Convert requirements into technical designs (behavior, data flows, contracts, responsibilities, error handling)

  • Review existing code and application behavior to validate proposed solutions

  • Collaborate with business analysts, solution architects, developers, and application administrators; support implementation

  • Perform targeted performance analysis of applications and IT infrastructure; identify root causes and recommend optimizations

  • Evaluate new technologies and IT tools and contribute to adoption decisions

  • Design secure solutions by identifying risks and coordinating with relevant teams

  • Use AI tools for analysis, design, and documentation; verify AI outputs

  • Coordinate with other departments on technology needs and change scope

  • Work in an Agile team, solve technical problems, and continuously improve ways of working

  • Document design decisions and communicate change scope, risks, and solution quality to stakeholders

  • Contribute to system development strategy by identifying architectural needs and proposing directions for change

Requirements

  • 3+ years of experience in technical design of IT systems or significant architectural changes

  • 2+ years of hands-on commercial software development; able to read code and trace actual request flow through the system

  • Ability to translate acceptance criteria into feasible technical design aligned with system architecture

  • Experience analyzing existing code and designing extensions to established mechanisms

  • Practical knowledge of frontend and backend web application architecture, including data flows, REST/JSON contract design, and integrations

  • Ability to design flexible, configurable solutions and assess impact on related processes

  • Experience diagnosing technical and performance issues and recommending optimizations for applications and infrastructure

  • Knowledge of authentication, authorization, and data protection principles

  • Hands-on experience using AI tools for code analysis/design/implementation/testing/documentation with critical evaluation of outputs

  • Ability to document technical decisions clearly and collaborate with cross-functional stakeholders

Benefits

  • Medical care, sports packages, parking, and a special mobile plan

  • Benefits platform with options to support body, mind, and soul

  • Extra day off for your birthday or name day

  • Referral program to invite friends and earn a bonus

  • Participation in social initiatives and recognized CSR programs

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